Debugger: use weak cells to implement ScriptCache.

Debugger: use weak cells to implement ScriptCache.

R=ulan@chromium.org

Committed: https://crrev.com/720d9c280a8e7415ed77ac846e955a8e163d834f
Cr-Commit-Position: refs/heads/master@{#28539}

[Yang, 2015-05-21 08:14:41]

On 2015/05/20 14:32:31, Yang wrote:

updated.

[ulan, 2015-05-21 08:21:44]

lgtm

[Yang, 2015-05-21 08:55:33]

The CQ bit was checked by yangguo@chromium.org

[commit-bot: I haz the power, 2015-05-21 08:55:46]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1145183004/20001

[commit-bot: I haz the power, 2015-05-21 09:02:18]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2015-05-21 09:02:18]

Try jobs failed on following builders:
  v8_linux_mipsel_compile_rel on tryserver.v8 (JOB_FAILED,
http://build.chromium.org/p/tryserver.v8/builders/v8_linux_mipsel_compile_rel...)

[Yang, 2015-05-21 09:27:19]

The CQ bit was checked by yangguo@chromium.org

[Yang, 2015-05-21 09:27:19]

The patchset sent to the CQ was uploaded after l-g-t-m from ulan@chromium.org
Link to the patchset: https://codereview.chromium.org/1145183004/#ps40001
(title: " ")

[commit-bot: I haz the power, 2015-05-21 09:27:39]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1145183004/40001

[commit-bot: I haz the power, 2015-05-21 10:35:56]

Committed patchset #3 (id:40001)

[commit-bot: I haz the power, 2015-05-21 10:36:14]

Patchset 3 (id:??) landed as
https://crrev.com/720d9c280a8e7415ed77ac846e955a8e163d834f
Cr-Commit-Position: refs/heads/master@{#28539}